I'm working with a multiply imputed dataset (so I have 5
poverty variables to account for missing values). I
used the -reshape long- command to make each imputed
variable it's own case (so now, for each case, I have it
listed 5 times each with 1 imputation of income).
I'm running a series of regressions, trying to fine tune
the predictor variables. The first regression runs
fine but subsequent regressions (whether I use my .do file
or copy & paste them into the command window) will not
calculate. I receive an error message stating that
"covariates in dataset 2 do not match covariates in
dataset1".
I checked the file and everything seemed fine; the only
things that don't exactly match across imputations of the
dataset are the poverty values. In fact, I've used
this exact procedure on 2 other (very similar) datasets with
no problems. It's only been in the last month that I
receive this message.
What doesn't make sense to me is that the first regression
command runs perfectly fine but subsequent commands do not
(they're all in exactly the same form-- mim: svy: logistic
dv iv1 iv2 iv3). And if I close Stata and then open it
and run the second regression it works. I've attempted
to run this analysis on Stata9 Intercooled and Stata11
SE. It doesn't seem to matter; I receive the same
error.
Do you have any recommendations or suggestions for me as to
why this happens and/or how to fix it?